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D r 2D r 2D r 2D r 2
D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2
D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2
D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2
D r 2D r 2D r 2D r 2D r 2D r 2D r 2D r 2